diff --git a/plugins/pluginmanager/quicksettingcontainer.h b/plugins/pluginmanager/quicksettingcontainer.h
index e4cd2ad46..c6cdbbb18 100644
--- a/plugins/pluginmanager/quicksettingcontainer.h
+++ b/plugins/pluginmanager/quicksettingcontainer.h
@@ -29,7 +29,7 @@ class QGridLayout;
 class DisplaySettingWidget;
 struct QuickDragInfo;
 
-DWIDGET_USE_NAMESPACE
+DGUI_USE_NAMESPACE
 
 class QuickSettingContainer : public QWidget
 {
diff --git a/plugins/sound/sounddeviceswidget.h b/plugins/sound/sounddeviceswidget.h
index 8359f0f2c..c889378d5 100644
--- a/plugins/sound/sounddeviceswidget.h
+++ b/plugins/sound/sounddeviceswidget.h
@@ -17,6 +17,7 @@
 namespace Dtk { namespace Widget { class DListView; } }
 
 using namespace Dtk::Widget;
+using namespace Dtk::Gui;
 namespace Dock {
 class TipsWidget;
 }